Paper bag



Sept. l1, 1928.

J. W. TAGGART PAPER BAG Filed Jan. 14, 1925 rll,|l|l|. |ll+ l I l l I ll l l l I 1| Patented sept. 11, 192s.

l i l 1,683,632A UNITEDSTATES PATENT OFFICE.

JOSEPH.' TAGGART, OF WATERTOWN, NEW YORK, ASSIGNOR TO TAGGART BROTHERSCOMPANY, 0F WATERTOWN, YORK, A CORPORATION 0F NEW YORK.

PAPER BAG.

Application led January 14, 1925. Serial No. 2,347.

This invention relates to paper bags in general, and has particularreference to the production of the heavier and coarser bags, commonlyused for bagging coal, cement, Hour and other pulverized products. andhas for yits particular object to provide novel,

simple, durable and strong means for forming Cab and closing the ends ofthe bags. A further object is Ato provide a bag of the class which ismade from prepared tubular stock, in one or more ply, whereintheopposite ends are doubled or folded upon themselves in oppositedirections, in a manner to eifectually seal as well as to reinforce thesaid ends, for pre- Vent-ing breaking and tearing, or leakage of thecontents of the bags. A further object is to provide certain of the bagswith a valve, by means of which the bags may be filled, the said valvepreferably being formed out of the material of the bag, andbeing'protected for its full length, by the adjacent folded end portion,in a manner to render the bag. in the vicinity of the valve, as strongas the other portions of the bag. A further object is to provide novel,simple and powerful means for securing the end-folds of the bag. Thesaid means preferably comprising wrought metal staples, which are driventhrough the several folds at each end of the bag, the saidstaplesfinally being clinched, in a manner to provide link-like binders orfasteners, that will not yield, or become unclinched, by the pressure ofthe contents, or by| rough handling of the bags. And a further object isto generally improve, simplify and render durable and indestructible theends and the adjacent body portions of paper bags of the,v

class.

VI attain these objects by the means set forth in the detaileddescription which follows, and as illustrated by the accompanyingdrawing, in which- Figure l is a plan view of the tubular` blank, fromwhich the bags are formed. Fig.

' 2 is an edgeview of the same, showing the valve' relatively to thefoldable top end portion. Fig. 3 is asimilar edge view, showing bydotted lines the first step of the folding and closing of the ends ofthe tube; also showing by the full lines, the final folding steps, andthe stapling or binding of the said ends. Fig. 4 is a side elevation ofthe device shown in Fig. 3. Fig. 5 is` a reduced broken eX- panded edgeview; showing one corner of the blank slitted for providing thevalve-Hap.

Fig. 6 is respectively a contracted and eX- panded view of the same;showing the severed valve-flap folded inwardly. Fig. 7 is a partial sideelevation and central longitudinal section, the section being taken online 7 7 of Fig. 6. Fig. 8 1s a fragmentarysection,

' on line 8--8eof/Figure 4, showing the'clinching of one of thefasteners.

Init-he drawing, 2 represents the tubular blank, which comprises thebody ofthe bag, the said tube preferably being made of tough rope orother paper stocks, the said tube being shown with laterally arrangedlongitudinal tucks 2', by means of which the tube ymay be readilyexpanded when filled, as

shown/in Figs. 3, 5 and 6. The tube 2 may comprise a singlesheet or webof paper, as shown (exaggerated) in the drawing, o r it` may consist oftwo or more sheets, known as multiply tubes. n forming-up the bags, thetubestock.- which is generally made continuous, by suitable machinery,is usually cut in lengths suitable for the different size bags. Fig.`1shows one of such lengths. When both ends of the tube are closed by themaker, a

filling valve, as 3, is usually disposed at or near one of the topcorners of the blank, as

shown in Figs. 2 to 7 inclusive. These valves are preferably formed byslitting longitudinally, asA at 3', the corresponding edges 2,

which comprise the outer margins of one of the tucks 2, as shown inFigs. 2, 5, 6 and 7, for providmg an integral valve-flap, as 3a.

After the slitting is effected, the iiap 3a is folded inwardly as on acrease indicated by the dotted line 3" in Fig. 5, after which the flap3a is again foldeddownwardly and out-- out danger of distorting thevalve, or weaken'- ing that particulanp'ortion of the bag. A

In the present showing, referring to Figs. 2, 6 and 7, the valve 3 islocated a considerable distance from the top end of the tube, so as toprovide a relatively long end margin or eX- tremity beyond the valve,for use ineecting the subsequent closing and sealing of the said'end,without distorting the valve. The folding of the endsy of the tubes isaccomplished in the following manner: The oppoed endV portions 2"--2`are next folded up wardly and downwardly respectively substantially onthe line corresponding to l 2t in Fig. 1, after which the free ends ofthe portions 2--2d are bent and folded around the ends of the tube, in amanner to dispose the said ends in close Contact with the opposite faceof the tube, as shown at 2x in Fig. 3. This completes the folding of theends of the bag, and not only tightly seals, but also greatly reinforcesthe said ends. The final operation consists of driving staples, as 5,through the mass of folds, as shown inFigs. 3 and 4. These staples arepreferably long enough to beclinched, as shown in Fig. 8, wherein theends of the ,tines 5 of the staples overlap, in a manner to form ovallink-like fasteners, which are not liable to spread or become loosenedby strains due to filling or-4 subsequent rough handling of the bags.The staples 5 may be disposed in aI single row across the foldedend-portions of the bag, as shown -in Fig. 4, or they may be arranged instaggered rows, in a well-known manner. The foregoing describes the modeand means for closing and sealing valve-bags, wherein" both ends of thebag are substantially closed, and wherein the filling is effected solelyby forcing the pulverized products through the relatively small valveopenings 3, as by a pipe 6, shown in Figs. 4 and 7.

Obviously the same method and means may be employed for closing andsealing the bottoms of the valveless bags, and after the said bags arefilled, the mouths or filling ends may be folded and secured, bystaples, by the use of any suitable machine (not` shown) in a wellknownmanner. My bag enclosing and sealing means are applicable to almostevery form of paper bag that requires closing and sealing of the ends,for protecting the contents, and for insuring the safe handling of thebags after they are filled.

Having thus described my invention, what I claim is- 1. In a bag, thecombination of a prepared tubular blank having a flexible square cut endand lateral longitudinal tucks` corresponding margins of one of saidtucks at one corner of J said square end of the blank being slittedlongitudinally to provide a valve flap comprising only the web ofthetuck and which is folded inwardly and then downwardly between thewalls of said tuck on the central line of fold of the tuck and ondiagonal fold lines converging at a point lying within said central lineof'fold, the end portions of the blank for the full width lof the blankat said end thereof above the inner end ofthe valve flap being foldedinwardly upon one sideof the body of the blank and secured thereto.

2. In a bag, the combination of a prepared tubular blank having aiexible square cut end ,and lateral ,longitudinal tucks, correspondingmargins of one of said tucks at one corner of said square end of theblankbeing slitted longitudinally to provide a`valve flap comprising`only the web of the tuck and which is folded inwardly and thendownwardly between the walls of said tuck on the central line of 'foldof the tuck and on diagonal fold lines converging at a point lyingwithin said central line of fold;

In testimony whereof'I aiix my signature.

VJOSEPH W. TAGGART.

